The Crisp OVERSIZE Quad Clamp is used on the Crisp Ultima Scooters and incorporates Four closing feathers tightened with Hex Bolts . The separated feathers are more efficient than a paired system and will stay tightened longer . Crisp Quad Clamps are manufactured from 6061 Aircraft grade aluminium . The Crisp Quad Clamp is a very good upgrade for any Scooter . Includes :- Gloss finish One Black Quad Clamp . Four Tensile steel Hex Bolts . Dimensions : Height 80mm , 34.9mm I/D .